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52+(x+12)=90
We simplify the equation to the form, which is simple to understand
52+(x+12)=90
Remove unnecessary parentheses
+52+x+12=+90
We move all terms containing x to the left and all other terms to the right.
+1x=+90-52-12
We simplify left and right side of the equation.
+1x=+26
We divide both sides of the equation by 1 to get x.
x=26
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